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Finding the Fourth Proportional to 486,250.08, 728,357.86 and 390,964.29

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Solution

The fourth proportional to 486,250.08, 728,357.86 and 390,964.29 is: 585,628.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,250.08 : 728,357.86 = 390,964.29 : x
  2. Step 2: Convert to fraction form
    486,250.08/728,357.86 = 390,964.29/x
  3. Step 3: Cross multiply
    486,250.08x = 728,357.86 × 390,964.29
  4. Step 4: Simplify right side
    486,250.08x = 284,761,913,600.82
  5. Step 5: Solve for x
    x = 284,761,913,600.82/486,250.08
  6. Step 6: Final answer
    x = 585,628.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.